I have a Model M coming my way and I tried to identify it, but the label on the bottom is torn off.
What remains of it suggests a serial starting with 138 which, to my limited knowledge, suggests a very early model.
This is contradicted by the top left blue IBM logo
which, to my knowledge, came later in the game.
Another noteworthy thing is that the PS/2 cable is fixed
All I know so far is that it is supposed to be a true buckling spring keyboard and not the rubber dome version.
It is an ISO-DE layout.
Are these few bits enough information to identify that particular board?
Thanks a lot in advance!